Function LLVMGlobalCopyAllMetadata 

pub unsafe extern "C" fn LLVMGlobalCopyAllMetadata(
    Value: LLVMValueRef,
    NumEntries: *mut usize,
) -> *mut LLVMValueMetadataEntry

Retrieves an array of metadata entries representing the metadata attached to this value. The caller is responsible for freeing this array by calling \c LLVMDisposeValueMetadataEntries.

@see llvm::GlobalObject::getAllMetadata()